VT ba ———— yw - - ~~ © 
1092 UROGENITAL SYSTEM. : 
the vesicule seminales and the terminal parts of the vasa deferentia. Jn the 
female it rests upon the anterior wall of the vagina. Laterally the bladder is sup- 
ported by the levatores ani muscles, and further from the middle line it is in contact 
on each side with the obturator internus ; it 1s separated from both of these muscles 
by a layer of the pelvic fascia. 
The opening of the urethra, or internal urethral orifice (orificium urethree 
internum), is placed in or near the part of the bladder wall which les lowest in 
the pelvic cavity. The term neck, or cervix, of the bladder is often applied to 
this region, as here the bladder appears as if it were suddenly constricted to 
form the urethra. The portion of the bladder wall behind the urethral orifice, 
ous = 
Aste) 
\ 
We 
_ Sacral 
promontory 
Peritoneal 
reflexion 
Cavity of 
bladder 
Recto-vesical 
pouch 
Symphysis 
pubis 
Vasa 
deferentia 
Rectum , 
Corpus 
cayernosunl 
Prostate 
External 
sphincter ani 
Anal canal 
Bulbo- Bulb of urethra 
cern sus — External 
nuscle 
sphincter ani 
f 
Fic. 738.— MESIAL SECTION OF THE MALE PELVIS. 
The bladder has been artificially distended. From a specimen in the Anatomical Department, 
Trinity College, Dublin. 
which is directed in the male towards the anterior wall of the rectum (and lies below 
and in front of the recto-vesical pouch), is called the base of the bladder (fundus 
vesice). The corresponding part of the bladder in the female rests against the 
anterior wall of the vagina. The term apex, or summit, of the bladder (vertex 
vesica) is applied to the portion which lies nearest to the upper border of the 
symphysis when the organ is empty, or but slightly filled. The apex rises high 
above the pubis into the abdominal cavity when the bladder is distended. Con-— 
nected with the apex of the bladder is a fibrous eord (ligamentum umbilicale— 
medium) which passes upwards, in the middle line, on the posterior aspect of the 
anterior abdominal wall to the wmbilicus. This cord represents the urachus, or 
portion of the allantois which lies within the body of the developing embryo. 
